Clone Troopers vs Stormtroopers

In an interview with Dave Filoni, the difference between Clone Troopers and Storm Troopers was laid
out...

In my opinion, having made The Clone Wars and now working with Stormtroopers, I would say that a Clone trooper could outgun a Stormtrooper rather easily. A Clone trooper was bred, born, raised to be a soldier. Lucky for them, the Jedi gave them a lot of personality, but they were very dedicated soldiers. Stormtroopers are drafted into service; you can join through academies. If you watch A New Hope they stand around and say, ‘Hey, you seen the new BT-16?’ They seem interested in their job but you question their dedication. They’re treated as expendable by the Empire, and they definitely can’t shoot anything. 

When Obi Wan says, ‘Only Imperial Stormtroopers are so precise’, I think he’s making that up on the fact that he used to fight with clones, so he assumes that a Stormtrooper is really good. Much to his shock those guys can’t hit an R2 unit in a naked hallway, let alone be precise. So I like Stormtroopers, I find them very interesting. The Stormtroopers have better gear, better weapons in a lot of ways but it’s just a different war they are fighting than the Clone troopers’ was.

link to the whole interview